Grouping records in a grid provides a very simple yet powerful way to make meaningful deductions quickly from potentially large data. In a company stock data sheet grid, we could group the records by industry so that companies will be grouped together by their respective industries.
Create a grid with ColumnModel from ColumnConfig objects, and GroupingStore instead of a regular ListStore, then set the column on which to perform the grouping operation using the groupBy() method of the GroupingStore class. Finally, set the grid's view to a GroupingView which extends the standard GridView class to provide specialized rendering for record grouping in a GXT Grid.
@Override
public void onModuleLoad() {
// A list for the column configurations
// Create columns as ColumnConfig objects, then add to the list
List<ColumnConfig> config = new ArrayList<ColumnConfig>();
ColumnConfig company = new ColumnConfig("name", "Company", 60);
config.add(company...